Comment # 1 on bug 1212483 from Andreas Schwab

(gdb) bt
#0  0x0000563f3c8b4a35 in ipv6_dad_timeout (
    user_data=user_data@entry=0x563f3db6f240)
    at ../src/core/dhcp/nm-dhcp-client.c:606
#1  0x00007fd88889e37d in g_timeout_dispatch (source=0x563f3db414e0, 
    callback=0x563f3c8b4a10 <ipv6_dad_timeout>, user_data=0x563f3db6f240)
    at ../glib/gmain.c:4933
#2  0x00007fd88889d82b in g_main_dispatch (context=0x563f3dac98f0)
    at ../glib/gmain.c:3381
#3  g_main_context_dispatch (context=context@entry=0x563f3dac98f0)
    at ../glib/gmain.c:4099
#4  0x00007fd88889dbd0 in g_main_context_iterate (context=0x563f3dac98f0, 
    block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at ../glib/gmain.c:4175
#5  0x00007fd88889dea2 in g_main_loop_run (loop=0x563f3dac99e0)
    at ../glib/gmain.c:4373
#6  0x0000563f3c8aa9a1 in main (argc=<optimized out>, argv=<optimized out>)
    at ../src/core/main.c:509
(gdb) p/x *self
$1 = {parent = {g_type_instance = {g_class = 0xaaaaaaaaaaaaaaaa}, 
    ref_count = 0xaaaaaaaa, qdata = 0xaaaaaaaaaaaaaaaa}, 
  _priv = 0xaaaaaaaaaaaaaaaa}